Samsung DS 5021D KEYSET General Description Manual page 20

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DOOR PHONE INTERFACE MODULE (DPIM) & DOOR PHONE
(see Figures 2–13 and 2–14)
The DPIM adapts any DLI circuit for use with the door phone unit
Commonly used to request entry through locked doors (interior or exterior) or as a room monitoring box
Provides contact control to be used with customer-provided electric door lock
Door phone is wall-mounted
Door phone is weather resistant
FIGURE 2-13
2.10
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FIGURE 2-14

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